patch 7.4.924

Problem:    DEVELOPER_DIR gets reset by configure.
Solution:   Do not reset DEVELOPER_DIR when there is no --with-developer-dir
            argument. (Kazuki Sakamoto, closes #482)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    924,
 /**/
     923,
 /**/